Putter sole



FIG. 1 is a perspective view of my new putter sole design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a heel side view thereof;

FIG. 4 is a back view thereof; and,

FIG. 5 is a toe side view thereof.

The portion of the putter head shown in phantom is for illustration purposes only and does not form any portion of the claimed design. 

The ornamental design for a putter sole, as shown and described. 